No time to handle VoIP notification when phone is locked

[HugoHeneault]

Expected Behaviour

We should have some time to run JS code after VoIP notification has been received when device is locked. Like waiting for user to answer/reject a call.

Actual Behaviour

Time isn't given for js app to run on VoIP notification when phone is locked.
But when device is unlocked, even if the app is backgrounded, the js code runs for awhile when VoIP notification is received.

Reproduce Scenario (including but not limited to)

• Setup an app receiving VoIP notif
• Add a setInterval logging something every 50ms
• When device is unlocked (with or without the app started), it runs
• If the phone is locked (and app started) logging only runs once.

Platform and Version (eg. Android 5.0 or iOS 9.2.1)

iOS 11.3.1

(Android) What device vendor (e.g. Samsung, HTC, Sony...)

Apple iPhone SE

Cordova CLI version and cordova platform version

cordova --version                                    8.0.0
cordova platform version android                     4.5.4

Plugin version

phonegap-plugin-push 2.1.3 "PushPlugin"

But it's the version right after the VoIP has been merged, before the 2.2.0 has been released (I can't do the 2.2.0 migration because of cordova required version)

Sample Push Data Payload

{"message":"Test","title":"Test","additionalData":{"coldstart":false,"content-available":1,"foreground":false}}

Sample Code that illustrates the problem

Here is the code I run on('notification')

let i = 0;

setInterval(() => {
    console.log(++i);
}, 50);

Logs taken while reproducing problem

[HugoHeneault]

So this seems to be caused by WKWebview (or Ionic's one). I just removed it and used the default UIWebView.

It might be related to
ionic-team/cordova-plugin-ionic-webview#110
ionic-team/cordova-plugin-ionic-webview#58
ionic-team/cordova-plugin-ionic-webview#41

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